ES2292364A1 - Solar collector for use with double thermodynamic thermal circuit for cold and heat production, is formed by two welded plates defining two independent internal circuits and water flows through one of circuits of solar collector - Google Patents

Abstract

The solar collector is formed by two welded plates defining two independent internal circuits. Water flows through one of the circuits of the solar collector under specified solar radiation conditions. The water is driven by a pump to the container. The captured energy is transferred through the coil. The pump stops operating when there is insufficient irradiance to obtain the desired temperature in the water and the compression cycle starts, during which a thermodynamic unit moves a coolant fluid.

Description

Dual thermal circuit solar collector thermodynamic for cold and heat production.

Technical sector

The present invention is related to alternative energies in general, and specifically with the use of both solar energy and that contained in the environment in the form of temperature to generate hot water.

Prior state of the art

Solar energy utilization systems are well known in the current state of the art. Through solar collectors thermal energy is obtained through a working fluid to heat water, although the operation of this equipment is limited to the levels of solar radiation that take place in the area where they are located, time of year or time of the day For this reason, it is essential to use energy support, based, in most cases, on electrical resistors or fossil fuels, methods that have nothing to do with obtaining energy in a limited way.
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Support systems are also known. based on thermodynamic cycles, of which the model of utility U 200600526 of the same inventor, who achieve a high thermal power up to ten times higher than electricity consumption that generate, by having the evaporator a compression cycle in the rear of the solar collector.

However, to this day the inventor does not Do you have any knowledge of a solar collector like the one you present said request, which incorporates the circuits in a single panel thermal and thermodynamic, being able to take advantage of radiation direct and diffuse solar, as well as environmental energy, providing hot water under any circumstances atmospheric, and even at night, presenting as a great advantage the possibility of reversing the cycle in summer, obtaining as cold result for air conditioning of homes and premises at the same time that hot water for pool heating or any other type of water volume, with a single panel and energy consumption reduced.

As a final result a solar panel is obtained of wide energy use and great versatility, destined to cover different needs with the same installation.

Description of the invention

Specifically the present invention proposes use a variable size plate according to the application and power to be used, consisting of two aluminum, copper panels or other electro-welded material, in whose interior two totally independent and arranged circuits are delimited to take advantage of the maximum possible panel surface and favor the transfer of energy with the environment, or two circuits Metals attached to the panel. One of them will circulate water, glycol or a mixture of them, and on the other circuit, a fluid refrigerant, (134-A or others) both belonging to totally different cycles. The panel thus formed will feature a paint or coating on your sun exposure face, which present as a main characteristic a high absorption and low emissivity of solar radiation. Said panel will be installed in a aluminum profile or other material that will give it resistance structural and will be coupled with a single or double solar crystal, and even in a vacuum that should provide high transimisivity to the radiation, originating inside this set the known greenhouse effect and favoring the efficiency of use of incident solar energy. To avoid possible thermal losses, it will be covered with a continuous layer of insulation both the back side of the panel and the sides.

In this way, in the presence of adequate levels of solar radiation, a pump will recirculate water or glycol in a closed circuit that will go from the panel, where it will capture calories, to the tank where the water to be stored is stored, giving them away Through a coil. In circumstances of low or null irradiance, the water circulation will cease and be put into operation the thermodynamic compression cycle, where the fluid refrigerant will circulate through the panel at its temperature of boiling, taking environmental energy when changing state liquid to gas, regardless of external conditions, yielding this temperature as it condenses and becomes liquid refrigerant again, in a second exchanger located in the water tank. The movement of this fluid to through the circuit will be carried out thanks to a group thermodynamic, equipment containing the compressor, the valve expansion, control system and other auxiliary elements.

This mode of operation to generate water hot can be used mainly in winter, since in summer the inversion of the thermodynamic cycle is possible, and the two working fluids would circulate simultaneously through the plate, thus, the cooling fluid would evaporate inside the house or building, serving as an air conditioner by providing cold water for fancoils or refreshing soil. The condensation of the gas would take place then, in the outer panel and it would be favored when circulating at same time cold water through the other circuit located in the panel. As a result, this water would get hot and could be used For domestic use or in swimming pools.

This cycle inversion would also look favored if the insulating layer that carries the plate in its part rear be replaced by an insulating layer in the form of blind, formed by vain eyelashes that could remain closed when the equipment functions as a condenser, opening when acting as an evaporator to generate hot water, since in this situation it will be necessary to have a greater surface area of heat exchange

The final aesthetics of the flat solar collector Thermodynamic presented here, can be as varied as designs they want to do the same always keeping the requirements indispensable technicians for its operation.

Description of the drawings

To complete the description that is being performing and in order to help better compression of peculiarities of the double thermal circuit solar collector thermodynamic that we propose, is accompanied by this report Descriptive, as an integral part thereof, the following figures:

Figure 1, in which the elements that make up the double thermal circuit solar collector thermodynamic

Figure 2, in which the installation is represented complete with the sensor and the thermodynamic compression cycle to generate hot water.

Figure 3, in which the installation is represented when it undergoes a reversal of the refrigeration cycle.

Description of the preferred embodiment

The detailed description of the embodiment preferred of the process of the present invention and of the elements that compose it, it is done in view of both figures. Figure 1 shows the elements that constitute the solar collector dual thermodynamic thermal circuit that are, first of all, the aluminum panel (2) consisting of two plates electro-welded inside which appear delimited two circuits, one for refrigerant circulation (3) and another for water circulation (4), with some nozzles (8) for entry and exit of both fluids. On this panel will go arranged a transparent cover of solar glass (7), originating a space inside to favor the greenhouse effect as well How to reduce thermal losses. The set is coated so much by its rear face as by the sides with foam polyurethane as thermal insulator (6), and finally it is coupled in a metal profile (5), able to withstand the conditions external

Figure 2 shows how the complete installation It would work to generate hot water. In circumstances meteorological of adequate solar radiation, the pump (15) recirculates water through the panel through the corresponding circuit (4), where after heating it reaches the first coil (11), yielding these calories to water. At the moment the conditions of irradiation is not enough to reach in the tank (10) the desired temperature, the pump would cease to recirculate water, the thermodynamic cycle, where the fluid enters refrigerant will pass through the panel (1) through the appropriate circuit (3) and when it evaporates it will take the latent heat of the environment, yielding it in the second coil (12) of the tank. The thermodynamic group (9) It is responsible for driving the fluid through the circuit, in addition to Control the installation.

However, in summer an investment will take place of the thermodynamic cycle, as can be seen in Figure 3, of such that condensation will take place in the solar collector (1) of the refrigerant gas, while evaporation will take place in the second coil of the tank (12), generating cold water that It will be used as housing or local air conditioning by fancoils When the panel is outside subjected generally at elevated temperatures, the condensation by circulating cold water through the corresponding circuit (4), water to be heated and used to generate sanitary hot water or heat a pool by example. The three-way valves (14) will make the circuit water change from the first coil (11) of the tank to the pool installation pipes (13), taking care of the cycle inversion the thermodynamic block controller (9).

Claims (3)

1. Dual thermodynamic thermal circuit solar collector for cold and heat production, characterized by being able to generate hot water in the presence or absence of solar radiation, being constituted by an aluminum panel (2) or other material, consisting of two welded plates that delimit two totally independent interior circuits (3 and 4) with their corresponding nozzles (8) for entering and exiting working fluid, their face being exposed to the sun covered with a selective coating of high absorption and low emissivity, standing on this one a solar tempered glass (7) as well as an insulating layer (6) both at the back and the sides in order to reduce thermal losses, this assembly being coupled in a metallic profile (5) and resulting in a solar collector ( 1) through which a mixture of water and antifreeze will circulate through one of its circuits (4) under favorable conditions of solar radiation, being driven by a pump (1 5) to the water accumulation tank (10), where it will yield the calories captured through the first coil (11), so that when the irradiance is not sufficient to obtain the desired temperature in the water, the pump will stop working, starting the compression cycle, where the thermodynamic block (9) will move a refrigerant fluid that will reach the outer panel at its boiling temperature and will pass through its corresponding circuit (3), taking the latent heat of evaporation from the environment, which will subsequently yield to the second coil (12) of the tank, where condensation of the refrigerant gas will take place, thus obtaining hot water regardless of the external conditions. 2. Dual thermodynamic thermal circuit solar collector for cold and heat production, same as claim 1, characterized in that the cycle can be reversed in summer, both circuits operating simultaneously, although the refrigerant circuit (3) of the solar panel acting as a condenser , obtaining cold water inside the tank (10) useful for air conditioning and circulating water through the other circuit (4), responsible for helping to dissipate the calories of the refrigerant and also serving, when reaching a certain temperature, to heat water, changing the position of the three-way valves (14) to circulate the water through the pipes of the hot water system (13). 3. Dual thermodynamic thermal circuit solar collector for cold and heat production, same as claims 1 and 2, characterized in that the insulating layer (6) will be shaped like a blind, so that it can be kept closed, insulating the panel when This acts as a condenser, or open when the panel acts as an evaporator and needs more heat transfer surface, this movement being regulated by the controller of the installation located in the thermodynamic group (9).